Ferritinosis, which actually refers to the deposition of red blood cells in the lungs due to excessive destruction of red blood cells in the lungs, contains large amounts of ferritin deposited in the lung tissue, mainly as a result of recurrent hemorrhages in the diffuse alveolar capillaries. Many causes can cause this, such as lobar pneumonia, especially during the red hepatomegaly phase. In addition, there is idiopathic pulmonary ferritinosis, the cause of which is unclear, which presents with a dry cough without sputum, blood in the sputum, or even marked hemoptysis, accompanied by symptoms of dyspnea such as chest tightness and shortness of breath. When the heart is involved, right heart insufficiency may occur, manifesting as palpitations, weakness, and even heart failure manifestations such as ascites and hepatomegaly.